1. Department of Chemistry, University of Akron, Akron, Ohio 44312-3601, United States
2. Department of Chemistry, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
3. Department of Chemistry and Biochemistry University of Minnesota—Duluth 1039 University Drive, Duluth, Minnesota 55812, United States
4. Department
of Chemistry, College of the Holey Cross, 1 College Street, Worcester, Massachusetts 01610, United States